Attachment for internal-combustion engines.



NI H. HEFT. ATTACHMENT FOR INTERNAL GOMBUSTION ENGINES.

APPLIGATION FILED JUNE 15, 1909.

953,382. Patented 1m29, 1910.

WITNESSES: INVENTOR UNITED sTnTnsgTiENT ormcn NATHAN `'.E. HEFT, 0F BRIDGEPOBT, CONNECTICUT.

ATTACHMENT ron INTERNAL-COMBUSTION ENGINES.

H. HEFT, a

in the art to which it appertains to makeand use the same.

My invention relates to certain improvements in attachment for internal combustion engines, and has for its objects to cool and scavenger the cylinders with fresh air, to brake the engine by the compression of air alone in the cylinders while the automobile is descending an incline, and to store pure air under compression in a reservoir especially provided. on the automobile for that purpose whereby tires may be. readily filled with air at sufficient ressure.

With these ends 1n view my invention consists in the combination and arrangement of parts hereinafter fully described and then particularly pointed out in the claims which conclude this description.

In the accompanying drawing Figure 1 is a schematic broken elevation illustrating my improvement as'a plied to an internal combustion engine. 1g. 2 a section at the line y, y, of F1 1, and Fig. 3 a section at the line a', o Fig. 1.

Similar numerals of reference denote like parts in the several gures of the drawing.

Heretofore, it has been common to brake the engine of an automobile by cutting out the spark so that the engine would work against the compression, and in this respect my improvement does not bring about the performance of any new function, but my improvement contemplates the cutting off of the gas supply when a machine is descending a hill, and scavengering and cooling the engine solely by fresh air unmixed with any gas whatsoever, and nothing else but 'fresh air is compressed in the cylinders during this time, and after the cylinders have been suiciently vcleared 'my invention provides for the closing of the exhaust outlet and the storing of the compressed air in a tank that is carried by the automobile so that the inlation of inner tubes may be effected by means of a connection between vthis air stor- Specication of Letters Patent. Patented Mar. 29,

Application led Jul-1e 15, 1909. Serial N0. 502,252.

age reservoir and the valve of such tube, all o which `will `be readily understood by reference to the followin description 1 represents the car ureter of any ordinary construction, 2 the cylinders, 3 'the intake pipe and 4 the exhaust pipe, all of such parts being ordinary in'construction and application.

5 is a casing which is interposed between the intake 3 and carbureter 1 and is securely bolted or otherwise secured in such relation said casing being open at the u per and lower ends, so that it will be clear y under- `stood that there is a direct communication through this casin between the carbureter and the intake, sai casing being, therefore, for all practical purposes, a part of the intake itself, and this casin is provided with an inlet 6 at the side for irect communication with the outside air.

Any suitable valve casing 7 is formed integral with or is rigidly secured to this inlet, and a valve 8 (shown in dotted lines at Fig. 2) carried by a stem 9 is provided whereby communication between the casin 5 and inlet 6 may be opened or closed, an a similar valve 10 (also shown in dotted lines at Fig. 2) is provided within the casing 7 and 1s carried by the stem 11, whereby the outer mouth of the inlet 6 may be opened or closed, for the purpose presently to be eX- plained. A

It is not deemed necessary toenter into any detailed description of these valves or their seats within t e inlet 6 since they are very ordinary in this respect, and, moreover, the sectional view shown at Fig. 3 will answer perfectly as to the constructlon and operation of these valves. l

The bottom of the casing 5 is provided with a valve 12 which is mounted on a stem 13, and this valve is operated to open or close communication with the carbureter for the purpose presently to be explained. Pivoted upon the base of the casing 5 is a rocker bar l14: which is provided at or about its central portion with a crank 15. l

16 is a clip secured to the outer ends of the valve stems 9, 11, and 17 is also a clip secured to the outer end of the valve stem 13, and the extremities of the rocker bar 14: y are connected with these clips 16, 17, by

means of links 18, 19,-whose extremities are pivoted'to said clips and to the ends of said rocker bar.

Fig. 2

'be/clear that when said rod is thrust outwardly the rocker bar will be swung and the parts will be carried to the position shown at that is to say, the valves 8, 10, will be opened while the valve 12 will be closed, and the reyerse movement of this rod will operl ate to close these valves 8, 10, and open .the

valve 12, it being essential that the valves in the inlet should always be open when the valve in the casing 5 is closed, and vice versa that the valves in the ,inlet should be closed when the valve in said casing is open.

21 is a short pi e which leads fromthe exhaust 4, at any suitable point beyond the cylinders`2 into an air reservoir tank 22, and 23 is the stem of a two way valve located at the point of junction between said exhaust and pipe 21. 24 is a lever securedto the stem 23, and by throwing this lever in one direction the exhaust pipe is closed and the passage from the exhaust pipe through the pipe 21 to the tank 22 is opened, while the throwing of this lever 24 in the o posite direction will close said passage an will leave the exhaust pipe open.

When an automobile equipped with my improvement is about to descend an incline of any material length, the rod 20 is operated to open the valves 8, 10, and close the valve 12, and as the machine descends the incline fresh air will be circulated through.

'the cylinders and discharged at the end of the exhaust pipe, and, at any desired moment, the lever 24 is operated to close the exha`` st pipe and to open the passage to the air t!` nk 22, and thereafter the Kair compressed in the cylinders will enter this tank, which latter is guarded by any suitable check valve (not shown).

v25 is any ordinary pop valvein the tank 22, whereby the latter may be-relieved in the event that the pressure therein becomes. too great.

After the cylinders have been sufciently scavengered by the fresh air the lever 24 is operatedto close the valve in the exhaust plpe whereby the air compressed in the cylinders will be delivered directly into the tank 22, and'immediately prior to the time when it becomes necessary to fire a compressed charge, said lever is operated to close the inlet to said tank and to open the exhaust pipe.

' Of course it will be readily understood that the rod 20 and lever 24 may be operated by any suitable and ordinary instrumentalities within convenient reach of the hand or foot of the operator, and I have not deemed it necessary to show such instrumentalities since they are very ordinary and vriitllliin the range of the usual mechanical s valve 12 closed, the compression within the cylinders will act as a brake to the engine, and it is not necessary to cut out the spark since there will be no gas within the cylinders. In fact, when the exhaust is closed by theroperation of the lever 24, the back pressure 1n the exhaust pi e will act against the exhaust valves in t e cylinders, thereby greatly increasing the resistance to the action of the engine, but shouldit become nec-.

essary to rincrease the speed of the engine while the clutch is still engaged, it is merely necessary to operate the lever 24 so as to open up the exhaust more or less and' thus relieve the itself.

My improvement may be applied to any style of internal combustion engine irrespective of the number of cylinders. There are many ways in which the valves in my 'improvement may be operated, all of which are very ordinary and do not involve invention, and therefore I do not wish to be limited to the particular arrangement of rocker bar and connecting links shown and described.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. A combined scavenging and air compressing apparatus, comprising, in combination with a gas engine, a casing interposed between the intake and thel carbureter, a gas supply valve operative between said casing and said carbureter, a valve controlling an air inlet in said casing, a secondary valve also controlling said inlet, and means for simultaneously closing said gas supply valve and opening said secondary and air inlet controlling valve.

2. A combined scavenging and air compressing apparatus, comprising, in combination with a gas engine, a casing interposed between the intake and the carbureter, a gas supply valve operative between said casing and said carbureter, a valve controlling an pressure inJ the exhaust pipe air inlet in said casing, a secondary valve\ between the intake and the enrburet'er, n reter is closed when said second and lthird lslide vulve o erative between said casing vulves are opened. 10

:1nd said cur ureter, a second slide Valve In testimony whereof I aiix my signature controlling an sur mlet 1n said casing, a' 1n presence ot' two witnesses.

third slide valve noting conjunotively with NATHAN H. HEFT. said second vulve to protect said air lnlet, u Witnesses: h 1r..f.-k-lever connection whereby seid slide- F. W. SMITH, Jr.,

vulve between said casing and said carbu- M. T. LoNGDEN. 

